If you don't have to take care of Environments, you could use entity attributes instead, i guess.

Maybe use a previous Action condition with one of the branches Lists_is in Custom List_1.<nameoflist> is greater that one. But the playbook would need to have check using the action Lists - Is String in Custom List prior to condition.

The issue there is that I want to know tickets opened ever/historically. I think that entity attributes might work even with environments though because I'd only want to report tickets opened for that specific environment.